Nut-lock.



J. A. P. LEE.

' NUT L cK. APPLICATION FILED JULY 13,1911.

1,104,681 I Patented July 21, 1914.

l L I 4.

Ill/m2 I Illl UNITED STATES PATENT OFFICE.

JOHN A. 1'. LEE, or TUCKER, ARKANSAS.

NUT-1306K.

' Patented July 21, 1914.

Application filed J uly 13, 1911. Serial No. 638,406.

To all whom it may concern Be it known that I, JOHN A. P. LEE, a citizenof the United States residing at Tucker, in the county of J efierson andState of Arkansas, have invented certain new and useful Improvements inNut-Locks, of which the following is a specification.

This invention relates to improvements 1n nut and bolt locks, and hasparticular reference to the cross-key type of such devices.

One object of the invention is to provide a longitudinally slotted bolt,and a plurality of cross-keys, whereby the bolt is spread outwardly tocause its threads to bind with the threads of the nut.

Another object resides in the peculiar construction and operation of thedevice whereby the first object is attained.

In the drawings, Figure 1 is a side elevation of the device, Fig. 2 is ahorizontal section on the line 22 of Fi 1, Fig. 3 is a verticaltransverse section t ough the nut and bolt, Fig. 4 is a vertical sectionthrough the nut.

Referring to the drawings, 10 represents a bolt and 11 the nut, each ofwhich is prothat the frlctional and positive lock between vided withusual threads.

The bolt is provided with the kerfs 12 and 13 formed longitudinally inthe threaded end of the bolt, at right angles to each other,

thus forming the four sectors 14.

The nut 11, as shown, is a four-sided one, but it will be understoodthat the device may be used with a nut having any number of sides.Formed 'transversely'through the nut, at right angles'to each other, andin difierent planes are the openings 15 and 15', which are reduced attheir inner ends, at the point where they communicate with the centralopening 16 of the nut, with the inwardly beveled faces 17. The size ofthe opening 15 at the point where it intersects the opening 16 is ofslightly greater diameter than the width of the slots 12 and 13 when thebolt isin expanded condition.

When the nut 11 is screwed home on the bolt 10, cotter pins 18 and 19are passed through the openings in the nut, and the slots in the bolt,the ends of the cotter pins being directed into the slots by means ofthe beveled faces 17, and when forced therethrough exert an expandingforce against the faces of the sectors 14; The said expanding force ofeach of the cotter pins is exerted at right angles to the other, so thatthe resultant of the combined forces will be in the direction of thedotted arrow. Thus the sectors of the bolt are forced into the nut, andefi'e'ctively prevent any rotation of the nut in either direction. Theends 20 of the cotter pins are bent against the side faces of the nut oneither side of the openings 15,. In applying the cotter pins, it isnecessary to force; them through the slots 12 and 13, the pins beingjust enough larger than theslots when the bolt is in its normalcondition, (that is before the application of the-pin) so that anexpansive force may be exerted against the sectors.

From the foregoing it will readily be seen that the device is simple,and that thesector portions of the bolt will be eflectively andpositively spread apart so that their threads will bind into the threadsof the nut.

Particular attention is called to the fact ment with the nut, and at thesame time prevent any relative rotation of the nut and bolt.

What is claimed is:

A 'nut and bolt lock comprisin a bolt having longitudinal .slots formedt erethroughand arranged at an angle' to each other, a. .nut having acentral threaded opening and openings through the nut in diflerentplanes intersecting the central opening at right angles to each otherand across the central opening, said openings being reduced in size tothe width of the slots in expanded condition at the points ofcommunication with the central. opening, and cross keys driven Intestimony whereof I aflix my signathrough said openings and the slots ofthe ture, in thepresenoe of two witnesses. bolt, said keys being, of awidth slightly in excess of the width of the slots in unexw JOHN 5panded condition whereby the portions of Witnesses:

the bolt bounding the said slots will be D. G. TUCKER,

forced outwardly against the nut. EDGAR FOSTER.

